package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.*;
import com.itheima.reggie.mapper.OrderMapper;
import com.itheima.reggie.service.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {

    @Autowired
    private  ShoppingCartService shoppingCartService;

    @Autowired
    private UserService userService;

    @Autowired
    private AddressBookService addressBookService;

    @Autowired
    private OrderDetailService orderDetailService;

    /**
     * 用户下单
     *
     * @param orders
     */
    @Override
//    public void submit(Orders orders) {
//        //获取当前用户id
//        Long userId = BaseContext.getCurrentId();
//
//        //查询当前用户的购物车数据
//        LambdaQueryWrapper<ShoppingCart> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(ShoppingCart::getUserId,userId);
//        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);
//
//        if (shoppingCarts==null || shoppingCarts.size()==0){
//            throw new CustomException("购物车为空，不能下单");
//        }
//        //查询用户数据
//        User user = userService.getById(userId);
//        //查询地址数据
//        Long addressBookId = orders.getAddressBookId();
//        AddressBook addressBook = addressBookService.getById(addressBookId);
//        if (addressBook==null){
//            throw new CustomException("用户地址信息有误，不能下单");
//        }
//
//        long orderId = IdWorker.getId();//订单号
//
//        AtomicInteger amount = new AtomicInteger(0);
//
//        //组装订单明细信息
//        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
//            OrderDetail orderDetail = new OrderDetail();
//            orderDetail.setOrderId(orderId);
//            orderDetail.setNumber(item.getNumber());
//            orderDetail.setDishFlavor(item.getDishFlavor());
//            orderDetail.setDishId(item.getDishId());
//            orderDetail.setSetmealId(item.getSetmealId());
//            orderDetail.setName(item.getName());
//            orderDetail.setImage(item.getImage());
//            orderDetail.setAmount(item.getAmount());
//            // 计算公式: 菜品的金额 乘以(multiply) 分数
//            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
//            return orderDetail;
//        }).collect(Collectors.toList());
//
//        //组装订单数据
//        orders.setId(orderId);
//        orders.setOrderTime(LocalDateTime.now());
//        orders.setCheckoutTime(LocalDateTime.now());
//        orders.setStatus(2);
//        orders.setAmount(new BigDecimal(amount.get()));//总金额
//        orders.setUserId(userId);
//        orders.setNumber(String.valueOf(orderId));
//        orders.setUserName(user.getName());
//        orders.setConsignee(addressBook.getConsignee());
//        orders.setPhone(addressBook.getPhone());
//        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
//                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
//                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
//                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
//        //向订单表插入数据，一条数据
//        this.save(orders);
//
//        //向订单明细表插入数据，多条数据
//        orderDetailService.saveBatch(orderDetails);
//
//        //清空购物车数据
//        shoppingCartService.remove(queryWrapper);
//    }
    @Transactional
    public  void submit(Orders orders){
        Long userId = BaseContext.getCurrentId();

        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);

        if (shoppingCarts==null||shoppingCarts.size()==0){
            throw new CustomException("购物车为空,不能下单");
        }

        //查询用户数据
        User user = userService.getById(userId);
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
        if (addressBook==null){
            throw new CustomException("用户地址不能为空");
        }

        long orderId = IdWorker.getId();
        BigDecimal amount=new BigDecimal(0);
        List<OrderDetail> orderDetails=new ArrayList<>();
        for (ShoppingCart item : shoppingCarts) {
            OrderDetail orderDetail=new OrderDetail();
            orderDetail.setOrderId(orderId);
            BeanUtils.copyProperties(item,orderDetail);
            amount=amount.add(item.getAmount().multiply(new BigDecimal(item.getNumber())));
            orderDetails.add(orderDetail);
        }
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(amount);//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(wrapper);

    }
}